Testnet Stacks Blockchain API Outage

Incident Report for Hiro Systems

Resolved

This incident has been resolved.

Posted Nov 18, 2025 - 11:58 EST

Update

We are continuing to monitor for any further issues.

Posted Nov 18, 2025 - 10:10 EST

Monitoring

The issue has been identified as a Cloudflare network outage. We will continue to monitor the situation as Cloudflare remediates the issue.
https://www.cloudflarestatus.com/incidents/8gmgl950y3h7

Posted Nov 18, 2025 - 09:42 EST

Investigating

We are investigating degraded performance with the Stacks Blockchain API in Testnet that began at Nov 18, 2025, 9:29 AM ET.
Data retrieved from this API’s endpoints may be several blocks behind. The Stacks Explorer, wallets, and any
services using the API may be impacted. We will share more details as additional information becomes available.

Posted Nov 18, 2025 - 09:35 EST

This incident affected: Services for Testnet (Stacks Blockchain API) and explorer.hiro.so.